MATEC Web Conf.
Volume 321, 2020The 14th World Conference on Titanium (Ti 2019)
|Number of page(s)||6|
|Section||Microstructure - Properties Relationships|
|Published online||12 October 2020|
Study of oxygen content in titanium alloys after exposure at elevated temperature
1 PSC VSMPO-AVISMA Corporation, Parkovaya st. 1, Verkhnaya Salda 624760, Russia
2 Ural Federal University, Mira st. 19, Ekaterinburg 620002, Russia
Isothermal oxidation testing of near α titanium alloys VT18U, VT20, Ti6Al7Nb and Ti6242S was performed in air at 560 °С for 1000 hours. Parameters of diffusion layer on the alloy surfaces were studied by microhardness indentations, optical microscopy, X-ray diffraction analysis and nuclear microanalysis. It was established that concentration of oxygen in diffusion layer of tested alloys after oxidation differs significantly. An approach was demonstrated and validated by nuclear microanalysis data that allows comparative evaluation of the total concentration of interstitial impurities in the diffusion layer by the X-ray diffraction method.
Key words: titanium alloys / oxidation / diffusion / latice parameters / X-ray diffraction analysis
© The Authors, published by EDP Sciences, 2020
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